noaa-lake-11130
Itilliq Lake, Baffin Island 2000 Year Geochemical and Chironomid Data
Thomas, E.K.; Briner, J.P.; Axford, Y.; Francis, D.R.; Miller, G.H.; Walker, I.R.
Itilliq Lake, Baffin Island 2000 Year Geochemical and Chironomid Data
2011-04-29
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/11130
Investigator
E.K.
Thomas
Investigator
J.P.
Briner
Investigator
Y.
Axford
Investigator
D.R.
Francis
Investigator
G.H.
Miller
Investigator
I.R.
Walker
earth science
paleoclimate
insect|paleolimnology
total head capsules,sediment,null,count,null,insect|paleolimnology,null,null,N,total identified
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Heterotrissocladius sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Tanytarsina
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Micropsectra sp.
earth science
paleoclimate
paleolimnology
nitrogen,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
delta 13C,sediment,null,per mil PDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Cricotopus/Orthocladius
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Pentaneurini
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Abiskomyia sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Corynoneura/Thienemanniella
earth science
paleoclimate
insect|paleolimnology
age,null,null,year Common Era,null,insect|paleolimnology,null,null,N,null
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Sergentia sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Zalutschia sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Tanytarsus lugens/Corynocera oliveri type
earth science
paleoclimate
paleolimnology
biogenic silica,sediment,null,percent,null,paleolimnology,null,spectrophotometry,N,null
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Chironomus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Paracladius sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Protanypus sp.
earth science
paleoclimate
paleolimnology
carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,total organic carbon/total nitrogen
earth science
paleoclimate
paleolimnology
chlorophyll,sediment,null,dimensionless,null,paleolimnology,null,spectrophotometry,N,650-750nm; relative absorbance value chlorophyll a
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Orthocladius trigonolabis
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Orthocladiinae
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Cricotopus sp.
earth science
paleoclimate
insect|paleolimnology
depth,null,null,centimeter,null,insect|paleolimnology,null,null,N,null
earth science
paleoclimate
paleolimnology
delta 15N,sediment,null,per mil AIR,null,paleolimnology,null,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
paleolimnology
carbon,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null
earth science
paleoclimate
paleolimnology
organic matter,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,null
earth science
paleoclimate
insect|paleolimnology
total head capsules,sediment,null,count per gram,null,insect|paleolimnology,null,null,N,null
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Psectrocladius sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Paratanytarsus sp.
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Orthocladius oliveri
earth science
paleoclimate
insect|paleolimnology
identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Mesocricotopus sp.
earth science
paleoclimate
paleolimnology
population abundance
earth science
paleoclimate
paleolimnology
geochemistry
geoscientificInformation
Arctic
-841 AD
2005 AD
2791 cal yr BP
-55 cal yr BP
Complete
69.9917
69.9917
-67.1167
-67.1167
Continent
North America
Canada
Nunavut
Itilliq Lake>LATITUDE 69.9917>LONGITUDE -67.1167
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Thomas, E.K., J.P. Briner, Y. Axford, D.R. Francis, G.H. Miller,
and I.R. Walker. 2011.
A 2000-yr-long multi-proxy lacustrine record from eastern Baffin
Island, Arctic Canada reveals first millennium AD cold period.
Quaternary Research, Vol. 75, Issue 3, May 2011, pp. 491-500.
doi:10.1016/j.yqres.2011.03.003
We generate a multi-proxy sub-centennial-scale reconstruction
of environmental change during the past two millennia from
Itilliq Lake, Baffin Island, Arctic Canada. Our reconstruction
arises from a finely subsectioned 210Pb- and 14C-dated surface
sediment core and includes measures of organic matter
(e.g., chlorophyll a; carbon-nitrogen ratio) and insect
(Diptera: Chironomidae) assemblages. Within the past millennium,
the least productive, and by inference coldest, conditions
occurred ca. AD 1700-1850, late in the Little Ice Age.
The 2000-yr sediment record also reveals an episode of reduced
organic matter deposition during the 6th-7th century AD;
combined with the few other records comparable in resolution
that span this time interval from Baffin Island, we suggest
that this cold episode was experienced regionally. A comparable
cold climatic episode occurred in Alaska and western Canada
at this time, suggesting that the first millennium AD cold
climate anomaly may have occurred throughout the Arctic.
Dramatic increases in aquatic biological productivity at
multiple trophic levels are indicated by increased chlorophyll a
concentrations since AD 1800 and chironomid concentrations since
AD 1900, both of which have risen to levels unprecedented over
the past 2000 yr.
STUDY NOTES: High-resolution multiproxy lake sediment record from Arctic
Canada for the past 2,000 years. Data include organic matter
content and insect assemblages as proxies of productivity,
interpreted as a temperature signal. The 51-cm-long surface
core (05ITLSC) was recovered from Itilliq Lake in 2005.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/itilliq2011.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/itilliq2011.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11